diff --git a/bancor_research/bancor_emulator/tests/package.json b/bancor_research/bancor_emulator/tests/package.json
index 360f7d5c..a41822da 100644
--- a/bancor_research/bancor_emulator/tests/package.json
+++ b/bancor_research/bancor_emulator/tests/package.json
@@ -7,7 +7,7 @@
         "@bancor/token-governance": "^0.1.8",
         "@nomiclabs/hardhat-truffle5": "2.0.6",
         "@nomiclabs/hardhat-web3": "2.0.0",
-        "@openzeppelin/contracts": "4.5.0",
+        "@openzeppelin/contracts": "4.9.1",
         "@openzeppelin/contracts-upgradeable": "4.5.2",
         "@uniswap/v2-core": "^1.0.1",
         "@uniswap/v2-periphery": "^1.1.0-beta.0",
diff --git a/bancor_research/bancor_emulator/tests/yarn.lock b/bancor_research/bancor_emulator/tests/yarn.lock
index b70e689e..1e1dc235 100644
--- a/bancor_research/bancor_emulator/tests/yarn.lock
+++ b/bancor_research/bancor_emulator/tests/yarn.lock
@@ -532,10 +532,10 @@
   resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.5.2.tgz#90d9e47bacfd8693bfad0ac8a394645575528d05"
   integrity sha512-xgWZYaPlrEOQo3cBj97Ufiuv79SPd8Brh4GcFYhPgb6WvAq4ppz8dWKL6h+jLAK01rUqMRp/TS9AdXgAeNvCLA==
 
-"@openzeppelin/contracts@4.5.0":
-  version "4.5.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.5.0.tgz#3fd75d57de172b3743cdfc1206883f56430409cc"
-  integrity sha512-fdkzKPYMjrRiPK6K4y64e6GzULR7R7RwxSigHS8DDp7aWDeoReqsQI+cxHV1UuhAqX69L1lAaWDxenfP+xiqzA==
+"@openzeppelin/contracts@4.9.1":
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.9.1.tgz#afa804d2c68398704b0175acc94d91a54f203645"
+  integrity sha512-aLDTLu/If1qYIFW5g4ZibuQaUsFGWQPBq1mZKp/txaebUnGHDmmiBhRLY1tDNedN0m+fJtKZ1zAODS9Yk+V6uA==
 
 "@sentry/core@5.30.0":
   version "5.30.0"